The Hundred Loves of Juliet by Evelyn Skye

A woman discovers that she is part of a legendary love story that spans lives, years, and continents in this modern-day reimagining of Romeo and Juliet.

I may go by Sebastien now, but my name was originally Romeo. And hers was Juliet.
It’s a frosty fairytale of an evening in small-town Alaska when Helene and Sebastien meet for the first time. Except it isn’t the first time. You already know that story, though it didn’t happen quite as Shakespeare told it.
To Helene, Sebastien is the flesh-and-blood hero of the love stories she’s spent her life writing. But Sebastien knows better—Helene is his Juliet, and their story has always been the same. He is doomed to find brief happiness with her over and over, before she dies, and he is left to mourn.
Albrecht and Brigitta. Matteo and Amélie. Jack and Rachel. Marius and Cosmina. By any name, no matter where and when in time, the two of them are drawn together, and it always ends in tragedy.

This time, Helene is determined that things will be different. But can these star-cross’d lovers forge a new ending to the greatest love story of all time?